Overview of Magnetics Program Present and Future presented by J.V. MinerviniMIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
J.H. Schultz,, P. Titus, J.V. Minervini,
B. Smith, M. Takayasu, J.V. Minervini
M.I.T. Plasma Science and Fusion Center
Burning Plasma Science Workshop II
General Atomics
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
1) Radiation-resistant insulation
2) High-temperature superconductors
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
SBIR's to CTD, CMI, and Eltron: Highly aromatic organics (Cyanate Ester);
Ceramics (ceramic binder before HT, VPI after), better mechanical and electrical
FIRE/NSO - 2 x 1010 for full life/performance
Insulation testing beginning at MIT (Bromberg)
Interlaminar Shear Stress
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
Malozemoff's Laws for Jc, Jeff:
Jc=9 (Annum-1990); Jeff (2001)=99 kA/cm2=990 A/mm2
Jeff=4 (Annum-Aug 1991); Jeff (Dec 2000)=37.3 kA/cm2=373 A/mm2
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
ASC Commercial Tape: Jeff=12 kA/cm2 (8 kA/cm2, reinforced)
Malozemoff suddenly optimistic by 33.3/12, 8 = 2.6x or 4.2x
At 12.5 % growth in 2001, Malozemoff's Reality-Checked Law it takes:
14 yrs to get to Dec 2000 predicted (unreinforced) & 21 yrs (reinforced)
Malozemoff's Reality-Checked Law
Jeff (kA/cm^2), BSSCO-2223 vs. Time
0
4
8
12
16
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28
32
8
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10
Sheet1
Year
Aug-91
Aug-92
Aug-93
Aug-94
Aug-95
Aug-96
Aug-97
Aug-98
Aug-99
Aug-00
1-Aug
1-Aug
Jeff (kA/cm^2), BSSCO-2223 vs. Time
Sheet2
Sheet3
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
Through ITER, Nb3Sn improved 70 % in 9 years
= 6.1 %/year
No large customers outside fusion program, HEP selected NbTi and superfluid He for LHC;
ITER EDA cancelled
Jc, Nb3Sn (A/mm^2) vs. Bt (T) at 4.2 K, -0.3 % strain
100
1000
10000
0
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MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
VLHC goal: 3 kA/mm2 @ 12 T, 4.2 K x Deff=40 mm
(vs. ITER 700 A/mm2, Deff=25 mm
Already up to 2 kA/mm2, x 3 improvement,
Jeff up x 5 from 280 A/mm2 to 1.4 kA/mm2 , 71 %/year!
(New SSI PM strand: 1 data point-Jeff=2270 A/mm2 @ 13.5 T!!)
Nb3Sn 2001 !
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
Place copper needed for protection/recovery in pure copper strands; major cost benefits for high Jceff strand
Tested in ITER sECRETS (1/3 Cu)
Next-generation coils with only 1/3 or 1/6 sc strands possible out to 12-14 T!
Chart2
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fCustrands
fscstrands
Bmax (T)
Strand Fraction
Superconducting and Copper Strand Fractions vs. Bmax (T) for HP-I Strand
0.9086371909
0.0913628091
0.8868304375
0.1131695625
0.8601210509
0.1398789491
0.8288483918
0.1711516082
0.7884183042
0.2115816958
0.7398128277
0.2601871723
0.6796295506
0.3203704494
0.5972673122
0.4027326878
0.4941519326
0.5058480674
0.3506663413
0.6493336587
0.1507712298
0.8492287702
HP-I
5470.1908383709
5533.5718812969
5612.7981849545
5707.8697493435
5834.6318351956
5993.0844425107
6199.0728320204
6500.1327859191
6912.1095649384
7561.7652549304
8655.0882454047
0.0000082644
0.0000127874
0.0000191803
0.0000278822
0.000040452
0.0000578412
0.0000825025
0.0001209905
0.0001789072
0.0002787203
0.0004689152
(A)
0.168127203
0.1184562318
0.0827590744
0.0583416756
0.0397161597
0.0269680165
0.0179740209
0.0111925111
0.0067932565
0.0037489921
0.0018360944
0.0002435779
0.0003015071
0.0003617943
0.0004241421
0.0004891265
0.0005566569
0.0006275117
0.0007043893
0.0007884797
0.0008880822
0.0010190158
Bmax (T)
Strand Fraction
Superconducting and Copper Strand Fractions vs. Bmax (T) for HP-I Strand
Sheet2
Sheet3
Tcs=6.5 K vs. Bmax (T)
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MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
10 K < Top < 25 K
Class A:
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
Medium Temperature Superconductor (MTS)
Jc(5 T, 10 K) = 2800 A/mm2
(same as NbTi at (5 T, 4.2 K)
Jc(12 T, 10 K) = 800 A/mm2
(>~ ITER HP-I at (12 T, 4.2 K)
Low-loss (Deff=9 mm) Internal Tin Nb3Sn with NbTi inserts
(Bochvar Institute; Moscow)
Even of replacing "Old Nb3Sn" at 10 K @ 8-13 T
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
Jeff,Nb3Sn (10 K) > 10 x Jeff,BSSCO (20 K), all fields
Jeff,BSSCO (20 K), useful out to 5 T
Jeff,BSSCO (35 K),
useful to 1-2 T
Jc, Jeff (A/mm^2) vs. Btran (T), 10, 20, 35 K;
HTS vs. MTS
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
Jeff,Nb3Sn (10 K) still > 10 x Jeff,BSSCO (20 K), all fields
Jeff,BSSCO (20 K), still useful out to 7 T, gaining on Nb3Sn
Jeff,BSSCO (35 K),
hors de combat
Jc, BSCCO (35 K)
Jeff, BSCCO (20 K)
Jeff, BSCCO (35 K)
Jeff,reinforced HTS (20 K)
Jeff,reinforced HTS (35 K)
Jc, Nb3Sn (10 K)
Jeff, Nb3Sn (10 K)
Jc, Jceff (A/mm^2)
Jc,Jceff (A/mm^2) vs. Btran (T), 10, 20, 35 K; HTS vs. MTS
2175.2
1442.4
652.56
432.72
435.04
288.48
49751.2437810945
36318.407960199
1342.194750121
987.7520247371
402.6584250363
296.3256074211
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Sheet4
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1.5987200483
1.2384889791
0.524860769
0
2.1098002056
1.9967067065
1.5527720982
1.1878039269
0.4760476479
0
2.0863675169
1.9622538582
1.5084063145
1.1402422717
0.433122738
0
2.0658644654
1.9286020854
1.4655242088
1.0954252222
0.3951255426
0
2.0476723826
1.8957059044
1.4240398662
1.0530371374
0.3612663307
0
2.0312889828
1.8635260282
1.3838778142
1.0128142378
0.3308952816
0
2.0163071219
1.8320282895
1.3449712743
0.9745353586
0.3034772189
0
2.0023974115
1.8011827589
1.3072607256
0.9380143747
0.2785709229
0
1.9892939878
1.7709630209
1.2706927261
0.9030939944
0.2558121891
0
1.9767828658
1.7413455808
1.2352189424
0.8696406743
0.2348999563
0
1.964692407
1.7123093771
1.2007953531
0.8375404517
0.2155849453
0
1.9528855202
1.6838353826
1.1673815915
0.8066955286
0.197660356
0
1.9412532791
1.6559062754
1.134940405
0.7770214709
0.1809542477
0
1.929709701
1.6285061692
1.1034372084
0.7484449122
0.1653232981
0
1.9181874752
1.6016203917
1.0728397157
0.7209016696
0.1506476917
0
1.9066344693
1.5752353018
1.0431176341
0.6943351979
0.1368269326
0
1.8950108725
1.5493381391
1.0142424118
0.6686953206
0.1237764142
0
1.8832868596
1.5239169002
0.9861870271
0.6439371875
0.1114246082
0
1.8714406814
1.4989602358
0.9589258141
0.6200204182
0.0997107614
0
1.8594571055
1.4744573665
0.9324343159
0.5969083976
0.0885830086
0
1.8473261413
1.450398012
0.9066891624
0.5745676962
0.0779968244
0
1.8350419999
1.4267723335
0.8816679673
0.5529675926
0.0679137553
0
1.8226022453
1.4035708847
0.8573492408
0.5320796797
0.0583003784
0
1.8100071019
1.3807845716
0.8337123164
0.5118775392
0.0491274483
0
1.7972588903
1.3584046184
0.8107372876
0.4923364728
0.0403691961
0
1.7843615681
1.3364225394
0.7884049538
0.4734332793
0.0320027544
0
1.7713203564
1.3148301145
0.7666967743
0.4551460698
0.0240076846
0
1.7581414361
1.2936193693
0.7455948277
0.4374541134
0.0163655882
0
1.7448317024
1.2727825575
0.7250817762
0.4203377093
0.0090597879
0
1.731398565
1.2523121463
0.7051408354
0.4037780789
0.0020750637
0
1.7178497877
1.2322008032
0.685755746
0.3877572758
0
0
1.7041933587
1.2124413855
0.6669107496
0.3722581094
0
0
1.6904373869
1.1930269299
0.6485905666
0.3572640809
0
0
1.6765900182
1.1739506447
0.630780376
0.3427593282
0
0
1.6626593703
1.1552059017
0.6134657973
0.328728579
0
0
1.6486534796
1.1367862298
0.5966328735
0.3151571103
0
0
1.6345802612
1.1186853088
0.5802680556
0.3020307139
0
0
1.6204474766
1.1008969639
0.5643581887
0.2893356654
0
0
1.6062627099
1.0834151607
0.5488904975
0.2770586978
0
0
1.5920333495
1.0662340006
0.5338525747
0.2651869776
0
0
1.5777665749
1.0493477164
0.5192323682
0.2537080841
0
0
1.5634693476
1.0327506688
0.5050181704
0.2426099901
0
0
1.5491484051
1.016437342
0.491198607
0.2318810451
0
0
1.5348102574
1.0004023406
0.477762627
0.2215099596
0
0
1.5204611857
0.9846403864
0.4646994927
0.2114857911
0
0
1.5061072427
0.9691463148
0.4519987706
0.2017979307
0
0
1.4917542542
0.9539150725
0.4396503217
0.1924360912
0
0
1.4774078218
0.9389417137
0.4276442938
0.1833902955
0
0
1.4630733264
0.9242213984
0.4159711121
0.1746508661
0
0
1.4487559319
0.9097493889
0.404621472
0.1662084151
0
0
1.4344605902
0.8955210478
0.3935863307
0.1580538348
0
0
1.4201920458
0.8815318353
0.3828568998
0.1501782882
0
0
1.4059548411
0.8677773068
0.3724246383
0.1425732012
0
0
1.3917533214
0.8542531109
0.3622812449
0.1352302538
0
0
1.3775916409
0.8409549868
0.352418652
0.1281413725
0
0
1.3634737674
0.8278787624
0.3428290183
0.1212987231
0
0
1.3494034882
0.8150203522
0.3335047227
0.1146947027
0
0
1.3353844156
0.8023757551
0.3244383581
0.1083219335
0
0
1.3214199921
0.7899410527
0.3156227254
0.1021732557
0
0
1.3075134958
0.7777124071
0.3070508272
0.0962417213
0
0
5.438
4.4626192099
3.606
3.1938532704
2.61
1
3.3554868753
2.8400792855
2.4693800618
2.2859534384
1.844685073
0.3365538225
2.8511359865
2.4557963764
2.149219674
1.9804797448
1.5476903084
0.2013829437
2.6651152012
2.3627972972
2.0471678438
1.8407288418
1.3394027956
0.1300052109
2.5433559614
2.3109945285
1.9777885231
1.7343404987
1.1700737132
0.0782913165
2.4475122123
2.2663221274
1.915619334
1.6416277944
1.0282068679
0.0382206737
2.3691589332
2.2239917136
1.8569123789
1.5584705122
0.9083424169
0.0070314534
2.3045119158
2.1832072919
1.8009075196
1.4831130747
0.8065414691
0
2.2508990838
2.1437378705
1.7472892647
1.4143312592
0.7196474827
0
2.2061950323
2.1054491887
1.6958354483
1.3511459473
0.645081907
0
2.1686725353
2.0682367176
1.6463638261
1.2927531534
0.5807310476
0
2.1369235327
2.0320136235
1.5987200483
1.2384889791
0.524860769
0
2.1098002056
1.9967067065
1.5527720982
1.1878039269
0.4760476479
0
2.0863675169
1.9622538582
1.5084063145
1.1402422717
0.433122738
0
2.0658644654
1.9286020854
1.4655242088
1.0954252222
0.3951255426
0
2.0476723826
1.8957059044
1.4240398662
1.0530371374
0.3612663307
0
2.0312889828
1.8635260282
1.3838778142
1.0128142378
0.3308952816
0
2.0163071219
1.8320282895
1.3449712743
0.9745353586
0.3034772189
0
2.0023974115
1.8011827589
1.3072607256
0.9380143747
0.2785709229
0
1.9892939878
1.7709630209
1.2706927261
0.9030939944
0.2558121891
0
1.9767828658
1.7413455808
1.2352189424
0.8696406743
0.2348999563
0
1.964692407
1.7123093771
1.2007953531
0.8375404517
0.2155849453
0
1.9528855202
1.6838353826
1.1673815915
0.8066955286
0.197660356
0
1.9412532791
1.6559062754
1.134940405
0.7770214709
0.1809542477
0
1.929709701
1.6285061692
1.1034372084
0.7484449122
0.1653232981
0
1.9181874752
1.6016203917
1.0728397157
0.7209016696
0.1506476917
0
1.9066344693
1.5752353018
1.0431176341
0.6943351979
0.1368269326
0
1.8950108725
1.5493381391
1.0142424118
0.6686953206
0.1237764142
0
1.8832868596
1.5239169002
0.9861870271
0.6439371875
0.1114246082
0
1.8714406814
1.4989602358
0.9589258141
0.6200204182
0.0997107614
0
1.8594571055
1.4744573665
0.9324343159
0.5969083976
0.0885830086
0
1.8473261413
1.450398012
0.9066891624
0.5745676962
0.0779968244
0
1.8350419999
1.4267723335
0.8816679673
0.5529675926
0.0679137553
0
1.8226022453
1.4035708847
0.8573492408
0.5320796797
0.0583003784
0
1.8100071019
1.3807845716
0.8337123164
0.5118775392
0.0491274483
0
1.7972588903
1.3584046184
0.8107372876
0.4923364728
0.0403691961
0
1.7843615681
1.3364225394
0.7884049538
0.4734332793
0.0320027544
0
1.7713203564
1.3148301145
0.7666967743
0.4551460698
0.0240076846
0
1.7581414361
1.2936193693
0.7455948277
0.4374541134
0.0163655882
0
1.7448317024
1.2727825575
0.7250817762
0.4203377093
0.0090597879
0
1.731398565
1.2523121463
0.7051408354
0.4037780789
0.0020750637
0
1.7178497877
1.2322008032
0.685755746
0.3877572758
0
0
1.7041933587
1.2124413855
0.6669107496
0.3722581094
0
0
1.6904373869
1.1930269299
0.6485905666
0.3572640809
0
0
1.6765900182
1.1739506447
0.630780376
0.3427593282
0
0
1.6626593703
1.1552059017
0.6134657973
0.328728579
0
0
1.6486534796
1.1367862298
0.5966328735
0.3151571103
0
0
1.6345802612
1.1186853088
0.5802680556
0.3020307139
0
0
1.6204474766
1.1008969639
0.5643581887
0.2893356654
0
0
1.6062627099
1.0834151607
0.5488904975
0.2770586978
0
0
1.5920333495
1.0662340006
0.5338525747
0.2651869776
0
0
1.5777665749
1.0493477164
0.5192323682
0.2537080841
0
0
1.5634693476
1.0327506688
0.5050181704
0.2426099901
0
0
1.5491484051
1.016437342
0.491198607
0.2318810451
0
0
1.5348102574
1.0004023406
0.477762627
0.2215099596
0
0
1.5204611857
0.9846403864
0.4646994927
0.2114857911
0
0
1.5061072427
0.9691463148
0.4519987706
0.2017979307
0
0
1.4917542542
0.9539150725
0.4396503217
0.1924360912
0
0
1.4774078218
0.9389417137
0.4276442938
0.1833902955
0
0
1.4630733264
0.9242213984
0.4159711121
0.1746508661
0
0
1.4487559319
0.9097493889
0.404621472
0.1662084151
0
0
1.4344605902
0.8955210478
0.3935863307
0.1580538348
0
0
1.4201920458
0.8815318353
0.3828568998
0.1501782882
0
0
1.4059548411
0.8677773068
0.3724246383
0.1425732012
0
0
1.3917533214
0.8542531109
0.3622812449
0.1352302538
0
0
1.3775916409
0.8409549868
0.352418652
0.1281413725
0
0
1.3634737674
0.8278787624
0.3428290183
0.1212987231
0
0
1.3494034882
0.8150203522
0.3335047227
0.1146947027
0
0
1.3353844156
0.8023757551
0.3244383581
0.1083219335
0
0
1.3214199921
0.7899410527
0.3156227254
0.1021732557
0
0
1.3075134958
0.7777124071
0.3070508272
0.0962417213
0
0
Reference
2175.2
1342.194750121
1140.4543945878
1066.0460804966
1017.3423845576
979.0048849049
947.6635732779
921.8047663278
900.3596335148
882.4780129215
867.4690141007
854.7694130663
843.9200822399
834.5470067654
826.3457861707
819.0689530472
812.5155931133
806.5228487701
800.9589645837
795.7175951289
790.7131463127
785.8769627917
781.1542080646
776.5013116327
771.8838803921
767.274990063
762.6537877238
758.0043490169
753.314743821
748.5762725626
743.7828421979
738.9304565108
734.0167999679
729.0408981398
724.0028407736
718.9035561284
713.7446272498
708.5281425509
703.2565744503
697.9326809528
692.5594259865
687.1399150683
681.677343493
676.1749547503
670.6360072903
665.0637481007
659.4613918369
653.8321044752
648.1789906477
642.5050839701
636.813339798
631.106629952
625.3877390348
619.6593620325
613.9241029484
608.184474265
602.4428970656
596.7017016792
590.963128738
585.2293305549
579.5023727502
573.784236064
568.0768183089
562.3819364211
556.7013285797
551.0366563673
545.3895069527
539.7613952773
534.1537662342
528.5679968277
523.0053983063
Jc, BSCCO (35 K)
Jeff, BSCCO (20 K)
Jeff, BSCCO (35 K)
Jeff,reinforced HTS (20 K)
Jeff,reinforced HTS (35 K)
Jc, Nb3Sn (10 K)
Jeff, Nb3Sn (10 K)
Jc, Jeff (A/mm^2)
Jc and Jc,effective (A/mm^2) vs. Btran (T); HTS vs. MTS Superconductors
BSSCO Lin T, Jc=f(Bc20)
Jc,BSCCO (20 K) (A/mm^2)
Jc, BSCCO (35 K)
Jeff, BSCCO (20 K)
Jeff, BSCCO (35 K)
Jeff,reinforced HTS (20 K)
Jeff,reinforced HTS (35 K)
Jc, Nb3Sn (10 K)
Jeff, Nb3Sn (10 K)
Jc, Jeff (A/mm^2)
Jc, Jeff (A/mm^2) vs. Btran (T), 10, 20, 35 K; HTS vs. MTS
BSSCO Jnorm Curve Simple
Jc, BSCCO (35 K)
Jeff, BSCCO (20 K)
Jeff, BSCCO (35 K)
Jeff,reinforced HTS (20 K)
Jeff,reinforced HTS (35 K)
Jc, Nb3Sn (10 K)
Jeff, Nb3Sn (10 K)
Jc, Jceff (A/mm^2)
Jc,Jceff (A/mm^2) vs. Btran (T), 10, 20, 35 K; HTS vs. MTS
Jnorm
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
7
5.438
4.4626192099
3.606
3.1938532704
2.61
1
3.3554868753
2.8400792855
2.4693800618
2.2859534384
1.844685073
0.3365538225
2.8511359865
2.4557963764
2.149219674
1.9804797448
1.5476903084
0.2013829437
2.6651152012
2.3627972972
2.0471678438
1.8407288418
1.3394027956
0.1300052109
2.5433559614
2.3109945285
1.9777885231
1.7343404987
1.1700737132
0.0782913165
2.4475122123
2.2663221274
1.915619334
1.6416277944
1.0282068679
0.0382206737
2.3691589332
2.2239917136
1.8569123789
1.5584705122
0.9083424169
0.0070314534
2.3045119158
2.1832072919
1.8009075196
1.4831130747
0.8065414691
0
2.2508990838
2.1437378705
1.7472892647
1.4143312592
0.7196474827
0
2.2061950323
2.1054491887
1.6958354483
1.3511459473
0.645081907
0
2.1686725353
2.0682367176
1.6463638261
1.2927531534
0.5807310476
0
2.1369235327
2.0320136235
1.5987200483
1.2384889791
0.524860769
0
2.1098002056
1.9967067065
1.5527720982
1.1878039269
0.4760476479
0
2.0863675169
1.9622538582
1.5084063145
1.1402422717
0.433122738
0
2.0658644654
1.9286020854
1.4655242088
1.0954252222
0.3951255426
0
2.0476723826
1.8957059044
1.4240398662
1.0530371374
0.3612663307
0
2.0312889828
1.8635260282
1.3838778142
1.0128142378
0.3308952816
0
2.0163071219
1.8320282895
1.3449712743
0.9745353586
0.3034772189
0
2.0023974115
1.8011827589
1.3072607256
0.9380143747
0.2785709229
0
1.9892939878
1.7709630209
1.2706927261
0.9030939944
0.2558121891
0
1.9767828658
1.7413455808
1.2352189424
0.8696406743
0.2348999563
0
1.964692407
1.7123093771
1.2007953531
0.8375404517
0.2155849453
0
1.9528855202
1.6838353826
1.1673815915
0.8066955286
0.197660356
0
1.9412532791
1.6559062754
1.134940405
0.7770214709
0.1809542477
0
1.929709701
1.6285061692
1.1034372084
0.7484449122
0.1653232981
0
1.9181874752
1.6016203917
1.0728397157
0.7209016696
0.1506476917
0
1.9066344693
1.5752353018
1.0431176341
0.6943351979
0.1368269326
0
1.8950108725
1.5493381391
1.0142424118
0.6686953206
0.1237764142
0
1.8832868596
1.5239169002
0.9861870271
0.6439371875
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0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
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MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
MTS Advantage:
Dry Enthalpy is Just Right
Enough dry enthalpy for stability
Not too much for protection
Can guarantee ramp to 4 T with Nb3Sn and Pb Solder
Toshiba experimenting with ErNi mats, EM up to 1 J/cc at 10 K
LDX F-Coil can be protected passively
(PW Wang, A Radovinsky simulations)
Passive protection vanished by 40 K
_1047841597.doc
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
Protection Problems at High T
Cp, vprop, Eheater = O's(M) worse at 35 K than at 10 K
(which is O(M) worse than 4.2 K)
Units
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
Heavy Ion Fusion Drivers
MIT Plasma Science and Fusion Center Fusion Technology & Engineering Division
Fusion Magnets Peer Review, MIT Plasma Science and Fusion Center; April 10-11, 2001
1) New radiation-resistant insulations should allow 2 x 1010 Rad BPX
2) RRI + MTS allow near-term neutron shield reduction,
refrig reduction for SC magnet systems
3) Nb3Sn revolution & SLCC allows "copper-cost" magnet systems
out to 12-14 T for near-term BPX